Crime-solving god-level fusion system

The meaning of coding! 【3】

Li Ze glanced around for a while and found that there was a reading room opposite the study room.
“What is that reading room for?”
Li Ze raised his eyebrows and asked.
“Most of them are professional books and materials for postgraduate entrance exams. Our postgraduate study room can’t hold so many materials, so we put most of the materials in the reading room opposite.”
Zeng Bo replied.
A few minutes later, Fang Mu also came out of the toilet, and he greeted Li Ze~.
“It just so happens that we still have to wait for Lu Sen to disappear. Let’s go to the reading room over there first – let’s take a look.”
Li Ze said.
Fang Mu nodded, then followed Li Ze to the reading room opposite.
The space in the reading room is very spacious, there are dozens of unified bookcases, and various books are neatly placed in the bookcases.
At this time, there were not many people in the reading room. There were several tables at the entrance. Several boys and girls dressed as students sat on the table and read some professional books attentively.
Seeing Li Ze and Fang Mu walking into the reading room together, these students just raised their heads and glanced at them, and then threw themselves back into the books.
“This floor is all re-planned. When I was a graduate student at J City University, the sixth floor was closed and not open to the public.”
Fang Mu said softly.
After all, this is the library reading room. In order to avoid disturbing the normal reading of those students, they also deliberately lowered their voices when talking.
Li Ze nodded, and then went to the bookcase to look around. There were a lot of books on it, and there were all kinds of professional information books.
He walked around for a while, then came to the bookcase in the area of ​​criminal investigation, picked up a copy of “Criminal Psychology Interpretation” and read it.
The content inside is very common, and it is similar to other criminal psychology books. With Li Ze’s own understanding of criminal psychology, he can write a more professional book by himself.
After casually flipping through it for a while, Li Ze felt a little bored. Just as he was about to put the book back in the bookcase, he suddenly found a white sticker on the back cover of the book.
He seemed to have found something, and carefully moved the white sticker closer, and there were a bunch of numbers on it—X18536.
A very familiar feeling lingered in Li Ze’s mind, he must have seen similar numbers somewhere.
After thinking for a few seconds, Li Ze couldn’t help shrinking his pupils.
The code on the deceased’s tun!
Thinking of this, Li Ze beckoned to Fang Mu who was beside him, motioned him to come over, and then handed the book in his hand to Fang Mu.
Fang Mu also took the book and carefully looked at the code on the back cover. After seeing the numbers on it, Fang Mu was also surprised.
“This is……”
Fang Mu said softly in disbelief: “The code printed on the tun of the deceased is actually the book number of these books in the library?”
“The sixth floor is newly opened, and the books inside are renumbered and coded, and the coding rules are completely different from the books on the floors downstairs. No wonder I didn’t contact this one immediately.”
As Fang Mu said, he took out his mobile phone from his pocket, opened the album, and found the death photos of the two deceased.
In the photo, the code of Deng Hui’s tun department in the first case is “X19621”, while the code of Wu Qiang’s tun department in the second case is “X19636”.
The two murdersThe coding is a bit different, but after clarifying what the coding means, everything becomes clear.
Although the codes of the two murders are somewhat different, after clarifying the specific meaning of the codes, everything becomes clear.
These two codes clearly correspond to the two books on the sixth floor of the library!
The two immediately started searching in the reading room, but they did not find any books corresponding to the codes on the deceased.
“Judging from the book numbers of the books, those two books should not be in this reading room.”
Li Ze said: “It should be in the bookcase in the study room opposite. Let Zeng Bo search for us in the computer library system first, otherwise we will find it like finding a needle in a haystack.”
Fang Mu also responded, then followed Li Ze out of the reading room and returned to the counter at the entrance of the study room.
“Two police officers, have you come out?”
Zeng Bo looked at Li Ze and the two in surprise.
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Li Ze directly pointed at Zeng Bo in front of him and said, “We need your help here to check the two book numbers. Look at which book it is.”
“No problem, this is within my business scope.”
Zeng Bo smiled and said, “You can just report the number to me directly.”
Li Ze nodded and said, “X19621, the other is X19636.”
“Okay, I’ll check it for you right away.”
Zeng Bo replied with a sound, and then immediately started to operate on the computer in front of him.
A few minutes later, Zeng Bo said to Li Ze, “I found out that these two books are professional books in the study room. One is called “Basic Knowledge of Public Security” and the other is “People’s Police Law.”
 …  
Hearing this, Fang Mu immediately frowned, “These two books are clearly the materials that the police need to learn to recite during the examination.”
Li Ze has also experienced police exams in his previous life, so he is very clear that these two books are indeed books that must be read for police exams, but why did the murderer print the book number codes of these two books on the tuns of the deceased?
What is the meaning of this?
“Can you check the debit status of this book for the past six months?”
Li Ze asked Zeng Bo in front of him.
“This also requires Teacher Lu Sen to come to view it. I don’t have the corresponding authority.”
Zeng Bo scratched his head a little embarrassedly and said, “But according to my experience working part-time here for many years, these two books are often borrowed, so the corresponding debit situation will be very complicated…”
“You mean, there are many people who borrow these two books?”
Li Ze raised his eyebrows.
“Yes, this is the material that must be borrowed by the police officers. Especially when facing the civil service exam, the number of debits for these two books is even greater. Some people borrowed this book yesterday.”
Zeng Bo said.
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